02-09-2019, 08:29 AM | #1 |
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How does the condition based service (CBS) work for brake wear?
My 2014 335i tells me that I have brake service coming up in about 700 miles. I looked at the pads and they look the same as my rears which have 40000 miles left. If I take it to the dealer or a shop, I am sure they will say that I need to replace brakes - who does not want to make money, right?
There seems to be information on the internet that CBS has a two stage warning - an orange light for service needed, and red one for unsafe conditions. I looked up CBS in the manual and it does not say anything about two stages. So what the deal? How does the CBS work? Did someone get two warnings? |
02-09-2019, 08:42 AM | #2 |
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CBS doesn't work as well as it should. The reading of miles left is a guesstimate until the sensor is triggered, because there's no actual mechanism to measure the pad thickness. My iDrive said I had 40,000 on my rears, until the sensor went off, and then it went to 1,000. My experience:
http://f30.bimmerpost.com/forums/sho....php?t=1471617 The only way to know the condition of the pads is to inspect them, all eight of them. If you had a sensor trip the sensor has to be replaced, whether the pads are replaced or not, so unless you're capable of doing your own work a trip to either the dealer or an indy is inescapable. |
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02-09-2019, 06:28 PM | #3 | |
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I intend to replace the sensors when I do the brakes, I would rather not go for a service unless the brake are really worn. |
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02-09-2019, 06:34 PM | #4 |
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This is why BMW has removed the brake pad life measurement from iDrive in G-platform new BMWs. My G30 530i no longer shows the brake pad life in iDrive but I gather it can still be accessed via the key reader at the dealer.
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02-09-2019, 09:40 PM | #5 | |
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It said brake service due in 1,000 miles, then updated it every 100 miles driven. It was down to 300 miles when I got around to changing them.
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02-16-2019, 05:50 PM | #6 | ||
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